Thermally toughened glass is always the preferred option if the bending resistance and thermal shock resistance of normal float glass are not sufficient, and single-pane safety glass does not offer the necessary residual strength because of its crumb structure in the case of breakage. The breaking pattern of thermally toughened glass is comparable with that of normal float glass.
If the glazing elements are fixed on all sides, thermally toughened glass ensures that the fragments do not come off the façade in the case of breakage (residual structural integrity).
Range of applications
| Vertical glazing | Floatglass | Thermally toughened glass | Single-pane safety glass |
| Without safety requirements | x | ||
| With safety requirements | x | ||
| Increased mechanical stress | x | x | |
| Increased thermal stress | x | x | |
| Residual structural integrity if fixed on all sides | x | ||
| Overhead Glazing | Floatglass | Thermally toughened glass | Single-pane safety glass |
| External pane | x | x | x |
| Monolithic internal pane | not allowed | not allowed | not allowed |
| Internal pane of laminated safety glass (residual structural strength)consisting of 2x | x | x | not allowed |
| Parapets | Floatglass | Thermally toughened glass | Single-pane safety glass |
| Monolithic | x | ||
| Laminated safety glass consisting of 2x | x | x | x |
| (With residual strength) laminated safety glass from 2x | x |